With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cvVoIPPeerCfgVADEnable
Cisco Voice Vo IP Peer Configure VAD Enable
1.3.6.1.4.1.9.9.63.1.2.3.1.7
This object specifies whether or not the VAD (Voice Activity Detection) voice data is continuously transmitted to IP backbone.
Back to CISCO-VOICE-DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor cvVoIPPeerCfgVADEnable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.